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EN 407

Gloves giving protection from thermal hazards

The nature and degree of protection is shown by a pictogram followed by a series of six performance levels, relating to specific protective qualities. The higher the number, the better the test result. The following is tested:

1 Resistance to flammability

The glove’s material is stretched and lit with a gas flame. The flame is held against the material for 15 seconds. After the gas flame is distinguished, the length of time is measured for how long the material either glows or burns.

2 Resistance to contact heat

The glove’s material is exposed to temperatures between +100°C and +500°C. The length of time is then measured for how long it takes the material on the inside of the glove to increase by 10°C from the starting temperature (approx. 25°C). 15 seconds is the minimum accepted length of time for approval. For example: to be marked with class 2, the glove’s inside material must manage 250°C heat for 15 seconds before the material exceeds 35°C.

3 Resistance to convective heat

The amount of time is measured for the heat from a gas flame (80Kw/kvm) to increase the temperature of the glove’s inside material by 24°C.

4 Resistance to radiant heat

The glove’s material is stretched in front of a heat source with an effect of 20-40 kw/kvm. The average time is measured for heat penetration of 2.5 kw/kvm.

5 Resistance to small splashes of molten metal

The test is based on the total number of drops of molten metal required to increase the temperature by 40°C between the inside of the glove and the skin.

6 Resistance to large splashes of molten metal

Simulated skin is attached to the inside of the glove material. Molten metal is then poured over the glove material. The total number of grams is measured of how much molten metal is required to damage the simulated skin.

 

Test Results measured in: Results
Nr     1 2 3 4
1
After-burn time
Seconds
≤ 20 ≤ 10 ≤ 3 ≤ 2
1
After-glow time
Seconds
infinity ≤ 120 ≤ 25 ≤ 5
2
Contact heat
Temp in °C after 15 seconds
100° 250° 350° 500°
3
Convective heat
Seconds
≤ 4 ≤ 7 ≤ 10 ≤18
4
Radiant heat
Seconds
≤ 5 ≤ 30 ≤ 90 ≤ 150
5
Drops of molten metal
Number of drops
≥ 5 ≥ 15 ≥ 25 ≥ 35
6
Molten metal
Gram
30 60 120 200
 

≥ = equal to or greater than ≤ = equal to or less than